Malicious PDF — malware analysis report

Static analysis result for SHA-256 a73d166d0953ecf7…

MALICIOUS

PDF

56.6 KB Created: 2020-08-03 17:09:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 71c71ee2bae7ad0ca506549b9fbac6ef SHA-1: e3a201428d875ae96153e0965e74f9861f54cc15 SHA-256: a73d166d0953ecf736453770fb46efe53b112e26787afd732c9c18f2fe18f7f3
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=codeigniter+hmvc+tutorial+pdf'. This URL is presented within the document body, disguised as a tutorial. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on Shopify. The primary malicious link is the most critical IOC.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=codeigniter+hmvc+tutorial+pdf
    • http://files.vielka.com/uploads/1/3/2/6/132695428/dobez_jifofelofolu_mewan.pdf
    • http://files.seinepacific.com/uploads/1/3/1/3/131380871/netifinu-jolove.pdf
    • http://files.ardentrive.com/uploads/1/3/0/7/130740175/pokib_xodedakadikasuf_lexujepege.pdf
    • https://cdn.shopify.com/s/files/1/0432/1722/3847/files/83803256787.pdf
    • https://cdn.shopify.com/s/files/1/0429/5183/5801/files/59607062369.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/fixugivogovevadeneresexu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/16826371615.pdf
    • https://cdn.shopify.com/s/files/1/0429/6730/2295/files/dodefarukawonutasiwiwepam.pdf
    • https://cdn.shopify.com/s/files/1/0434/0105/2321/files/30504426294.pdf
    • https://cdn.shopify.com/s/files/1/0431/4316/8156/files/dopese.pdf
    • https://cdn.shopify.com/s/files/1/0430/9365/5716/files/11489262963.pdf
    • https://cdn.shopify.com/s/files/1/0435/4713/2068/files/17419299123.pdf
    • https://cdn.shopify.com/s/files/1/0431/8062/1984/files/panasonic_fax_machin.pdf
    • https://cdn.shopify.com/s/files/1/0433/0074/9467/files/bisowix.pdf
    • https://cdn.shopify.com/s/files/1/0431/3025/7568/files/fenubotexerobunelekaf.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000973f.bin
6f689184532be30d45174d366357a23489094d6e8b958e88971ca56b72b5df99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x973F 5356 bytes
font_01_sfnt_off0000a952.bin
06170b24ef175eeac0bf5c734983284cefe8c26358ad22ed6ce8a3bf73c1ccc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA952 13736 bytes

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